Chelsea threw away a two-goal lead in a 2-2 draw with lowly Southampton in the Premier League on Wednesday.
New Blues signing Demba Ba and Eden Hazard netted before the break but substitute Rickie Lambert and Jason Puncheon equalised at Stamford Bridge.
The hosts, who trail leaders Manchester United by 13 points, took the lead 26 minutes in, as ex-Newcastle United striker Ba drilled his shot into the far right corner after Cesar Azpilicueta's cross was deflected up in the air by Jos Hooiveld.
At the other end, Steven Davis side-footed the ball just past the post after being teed up by Jay Rodriguez in the 36th minute.
Chelsea veteran Frank Lampard then cracked an attempt wide before Hazard struck with a controlled volley from the edge of the box on the stroke of half-time.
The visitors, though, hit back in the 58th minute, as Lambert, on for Rodriguez, headed home Nathaniel Clyne's delivery.
Eleven minutes later Ba came close to completing a brace but the Senegal international fired over after combining superbly with Lampard.
Soon after Lampard directed his free-kick narrowly off target, with goalkeeper Artur Boruc well beaten.
Rafa Benitez's men were then knocked back in the 75th minute, when Puncheon smashed in teenager Luke Shaw's cross from the left.
Chelsea pressed for a winner in the closing stages but Nigel Adkins's side held on for a point.